Colored photographic print and making same.



TAT

FREDERIC E. IVES, OF WEEHAWKEN, JERSEY.

COLORED PHOTOGRAPHIC PRINT AND MAKING SAME.

960,939. No Drawing.

To all whom 'it may concern:

Be it known that I, Fnnmcmo E. Ives, a citizen of the United States, residing in \Voodcliife-on-Iludson, WVeehawken', New Jersey, have invented certain Improvements in ColoredPhotographic Prints and in Mak; ing Same, of which the following is a specification. I,

My invention is an improvement upon a method which I described in a paper published-in the Journal "of the Ua'mcrruo'lub, London, April, 1894, page 63, as follows:

The examples which I shall show were In de from photochromoscope negatives. Bichromatizcd gelatin films .on clear celluloid were exposed from the back by electric light, developed as carbon prints,

the images cut apart and each dyed to a 'suitable'depth by immersion in a solution of A great its proper printing color. degree of precision is necessary to secure the correct proportionate depth of coloring in the three prints.

The above described process was not as practical as was desired for the following among other reasons: 1. Celluloid films thick enough to be satisfactorily coated with the necessary thickness of gelatin for the process were objectionable because of color and of shrinkage and tendency to buckle through gradualevaporation or solution of contained calnphor, and because when the prints were used as lantern slides the effect of heat in, the lantern upon the celluloid was liable to destroy or seriously damage the pictures. 2. The bichromated gelatin film must be of such thickness that detail may heretainedin the prints from both ends of the scale of gradation from black to white of the negative, and owing to the small percentage of bichromatesalt that can be "ineorporated with gelatin without c rystallization in drying, the gelatin film must be so thick as to make the process of develo ment in warm water tediously slow, and t e resulting print difficult to color up correctly, since if the color bath roved to'have been too strong for the-sub eCt, washing to reduce the strength acted relatively too fast upon the thin parts, and strengthening the use of a stronger dye bath, also acted relatively too fast on the thin parts. 3. The

Specificationpf Letters Patent.

, ing dissolved and washed away,-'leaving a Patented June 1, 191 0.

Application filed SeptemberM, 1909. Serial No. 517,619.

finished color printswere seldom as sharp as is desirable, and the relief was so great that it became necessary, in order to obtain satisfactory results with the lantern slides, to seal the prints together with Canada balsam. By my improved process, all of these'ditficulties and defects are substantially eliminated, the time and labor involved greatly reduced, and the quality of the results improved. These improvements have been ofchromated fish glue for hichronu'ited gelatin; but these substitutions involve new methods of procedure, which are a part of my invention.

The an'iyl-acetate collodion film, containing no camphor, is unaffected by water and by any' tem ierature to which the prints are ever legitimately subjected. So much bichromate salt may be incorporated with the fish glue without crystallization in dryin by heat, that a much thinner coating is'su lic ient for the purpose than when gelatin is employed, furthermore, the development may .he made'in cold water and completed in a few seconds, the dyeing and finishing of the color print may be effected in a few min utes, and the relief of the print is so slight as to be practically unobjectiona-ble.

' as follows: Clean sheets of glass are leveled and evenly coated with. liquid amyl acetate collodion, and allowed to dry spontaneously, though afteri'ard they may be subjected to heat to drive off the last traces of volatile is flowed with a'solution of fish glue and bichromate of ammonia,spread with a-photoengravefs whirler, and dried by moderate heat while .\\'hirling. 'lhe collodion film, bearing the birhromated lish glue coatin is stripped from the glass and exposed to daytric are, under the photographic negative, with the collodion side next? to the negative.

By immersion .in running water, the print portions of the sensitized coating which have not been acted. upon by the, light, be-

re f print, which may be at once immersed In carrying out my invention, I proceed.

light or suitable substitute such as the elec-' fected by substituting a film of amyl-acetate collodion for celluloid, and a coating of bimatter. The collodion surface of the plates is fully developed in a few seconds, those in an aqueous dye bath, such as-a sol-ution'of in a few seconds, or in a few minutes at most, then rinsed oh and hung up to dry. The. print is in low relief because of the ver thin sensitized coating in which it was produced. The finished iliii color prints may be superposed in register between glasses to make trichromatic lantern slides or window transparencies, or upon paper or other opaque white surface to make composite color prints to be viewed by reflected light.

in makingtrichromatic lantern slides, I prefer to "reduce the number of reflecting surfaces by. cementing two of the film color prints to glass, and do this by laying them down on-a wet gelatin-coated glass and put ting them aside to dry over night or longer .if necessary. They are then placed face to face, and the third print, on collodion film,

held iin lace between them, with the images all brought into register, after which they are. bound together to complete the lantern slide.

To superposdxthe color prints on paper, I may paste one face down on the paper, and after it has becon e perfectly dry by evaporation through the paper, the collodion film may be pulled off, leaving the print on the paper. The second print may then be pasteddown on the first one, and when erfectly dry its collodion film pulledoif. The third print may then be put down in the same way. In this process I prefer freshly made starch paste to gelatin or glne,vusing a libcral amount and pressing out the surplus by 'means of a squeegee. Care should be taken to use a suitable paste and to thoroughly dry the print before attempting to pull ofi' the collodion film. It is evident that the collodion film might be dissolved off with amyl acetate instead of pulling it oil', but the best and quickest method is to pull it otf. Prints intended for application to pa )cr should be colored up in a much weaker (lye bath than is desirable for making lantern slides and window transparencies.

The amyl acetate collodion may be made bydissolvipg soluble gun cotton in amyl acetate, but substantially such a collodion of suitable consistency is a .trade product, known as albaline.

lit should be understood thatwhilea substitute for amyl acetate collodion may be used which is an equivalent therefor, within the scope of my invention, such for instance as anainyl acetate acetone collodion, the

substitute should not be so porous as to absorb color in the dye baths, and for this reason the ordinary alcohol-ether collodion not intended for use in the lantern or is designed for such other use as will notssubject it to an injurious degree of heat. A ayl acetate collodion however is preferred in all cases.

Gelatin can be rotted so as to act much like fish glue in carrying out my invention,

hence theterin fish glue should be taken as descriptive, rather than as rigidly definite, such term meaning a coating which will permit of-. the incorporation therewith of a rela'tivelyfhigh percentage of the sensitive salt without crystallization. The coating is also, by preference, one which is soluble in cold water, and which, in solution, is of uniform character, and so fluid that it can be evenly distributed over the surface of its support by means of a whirler, and dried by the application of heat.

Instead of washing the print before immersion in the d e bath, the latter may also serve as a washing bath, the dye bath beingso inexpensive that the limit to its period of usefulness, due to its gradual saturation with the fish I claim:

1. As an improvement in the process of making colored photographic prints, the mode herein described, which consists in providing the surface of a transparent supporting ody with a sensitized coating of cold-water-soluble glue, then exposing this sensitized coating, through the transparent support, to light coming through a ne ative, and then developing in water to pro uce a relief print graduated in thickness.

2. As an improvement in the process of making colored photographic prints, the mode. herein described, which consists in providing the surface of a transparent supporting body with a sensitized coating of cold-water-soluble glue, then exposing said sensitized coating, through the transparent support, to light coming through a negative, and then developing and dyeing thesaid exposed coatingtoproduce a colored relief print graduated in thickness.

3. As an improvement. in the process of making colored photogra hic prints, the mode herein described, w ich consists in providing the, surface of an amylacetate collodion film with a sensitized coating of fish glue, then exposin said sensitized coatglue, need not: be considered.

ing, through the COllOdlOXl film, to 1i ht coming through a negative, and then evelop-- ing and dyeing the exposed coatingtogprpmaking colored photographic prints, the mode herein described, which consists in roviding the surface of an amylacetate collhdion film with a sensitized coating of fish glue soluble in cold water, then exposing said sensitized coating, through the collodion film, to lightcoming through a negative, and then developing and dyeing the exposed coating to produce a colored relief print graduated in thickness.

5. As an improvement in the process of making colored photographic prints, the

' mode herein described, which consists in providing the surface of an amylacetate collodion filmwith a sensitized coating of fish glue, then exposing said sensitized coating, through the collodion film, to light coming through a negative, and then develo ing and dyeing said coating to produce a co ored relief print graduated in thickness.

(5. As an improvement in the process of making colored photographic prints, the mode herein described, which consistsin providing the surface of an amylacetate collodion film with a'sensitized coating of fish glue soluble in cold water, then exposing said sensitized coating, through the collodion film, to light ing through a negative, and then developing and d eing the coating to produce a colored relic print graduated in thickness.

8. As an improvement in making trichromatic photographic prints, the mode herein described which consists in providing the surfaces of each of three amylzf'cetate collodion films with a sensitized coating of fish glue. exposing each of said coatings, through the collodion film, to light coming through a negative representing its respective color sensation, developing and dyeing the coatings to produce three properly colored relief prints graduated in thickness, pasting one or said prints face down upon an opa e surface, stripping the collodion film from the print when the latter is dry, and then superposing the other prints upon said first print by a repetition of such pasting and stripping operations. p

9. As an improvement in the process of making colored photographic prints, the mode herein described which consists in coating one surface of a transparent support with sensitized fish glue, spreading and drying said coating by whirling the same under moderate heat, and then producing a dyed relief print in said coating.

10. As an improvement in the process of making colored photographic prints, the mode herein described which consists in coating one surface of an amylacetate collodion film with'sensitized fish glue, spreading and drying said coating by whirling the same under moderate heat, and then-producing a dyed relief print in said coating.

11. As an improvement in the process of making colored photographic prints, the mode herein described which consists in applying a transparent film to a rigid support, drying said film, coating the exposed surface of the dried film with a sensitized solution of fish glue, spreading and drying said coating by whirling the same under moderate heat, stripping the coated film from its support, and producing a dyed relief print in said coating. L

12. As an im rovement in the process of making colored photographic prints, the mode herein described which consists in applying an amylacetate collodion film to a rigid support, drying said film, coatin the exposed surface of the dried film wlth a sensitized solution of fish glue, spreading and drying said coating by whirling the same under moderate hga-t, stripping the a dyed relief print in said coating.

supporting film of transparentmaterial having a sensitized surface coating of fish glue.

14. A film for the production of a colored photographic print, the same consisting of a supporting film of amylacetate collodion lue.

15. A film for the production of a colored photographic print, tlie same consisting of a supporting film of transparent material having a sensitized surface coating of fish glue soluble in cold water. l 16. A film for the reduction of a colored photographic rint, t 1e same consisting of a upporting fi in of amylacetate collodion having a sensitized surface coating of fish glue soluble in cold water.

1'7. A colored photographic print consisting of a supporting film of heat-resisting, unit-absorbing collodion provided with a dyed relief print in fish glue.

, 18. A colored photographic print consist ing'of a supportin film of amylacetate collodion provided with a dyed relief printin fish glue.

19|.'A composite colored photographic coated film from its support, and producing 13. A film for the production of a colored photographic print, the same consisting of ahaving'a sensitized surface coating of fish print consisting of an opaque support carrytiled in thielme s, and each constituting one 1 ing three directly superposed and differently I member of the composite print. 1

(colored relief prints, euvlr graduated in in testimony whereof, I have signed my thickness, and each constituting one member name to this specification, in the presence of of the composite print. two subscribing witnesses.

20. A composite colored photogruphie FREDQRIC IVES. print 'coilsistiug of an opaque support carrying three directly superposed, and clifi'erent ly volored relief prints in fish glue, each gradu- 11.. tYitueQ-ses:

Hun 'm'w D. Timxrii, KATE A. I

mm mm. 

